Kagome / Netafim Twin Lateral Trial
Kagome / Netafim Twin Lateral Trial • The Problem… • Application of technology – the Israel trip • What we are hoping to achieve • New dripper technology • Low flow Concept • Trial System Design • Results • Moving Forward
The Problem Sub-surface drip issues 250mm Drip tape soil compaction/consolidation root growth cracking/fracturing
What are trying to achieve • Its been clearly identified that year on year concentrated irrigation is causing soil consolidation/compaction and a change in conditions around the drip tube that is resulting in yield reduction over time. • We can show that by ripping this country we can break up this consolidated zone and improve yields potentially back to a year 1 result • Following a trip to Israel we learnt that emitter technology is heading towards the ability to use lower flow rates. • These lower flow rates are showing a tendency to have much better lateral movements of water than our traditional flows, this gives us the option of laying 2 laterals in our beds which means we then have the option of ripping between the laterals each year allowing us to potentially not experience the yield drop
Du Dual La Lateral l – Con oncept Dual lateral Standard Still some soil consolidation? cracking/fracturing Ripping in centre of bed to facilitate root development root growth Larger root system = greater yield potential
Du Dual La Lateral l – Trial rial De Design Dual lateral #1 150mm 400mm Standard Dual lateral #2 250mm 200mm 400mm Drip tape Dual lateral #3 250mm 500mm
Du Dual La Lateral l – Trial rial De Design Dual Lateral Trial Merrybank - Valve 22 (1.7Ha) Farm Bunnaloo Rd Entrance Submain/Riser Valve/RTU 3 3 3 3 3 2 2 2 2 2 1 1 1 1 1 3 3 3 3 3 2 2 2 2 2 1 1 1 1 1 Channel North North
Block Details Variety H1175 mix 20 th November Planting date Planting density 18,000/Ha Pre Plant Fertilizer 350kg/Ha – 70 %DAP, 30% Potash Blend (45 units N, 50 units P) Fertilizer total units 330 N, 94 P, 52 K, 35 Ca 4 th November Metham date Pre Irrigation 2ML/Ha Water Use to date 5.9ML/Ha Paddock History 2014/15 Tomato (H4401) 2015/16 Fallow 2016/17 Tomato (H3402 mix) 2017/18 Fallow Predicted Yield 100T/Ha
Trial Design Date Table Original system Twin Lateral Row/Bed Spacing 1.52 1.52 Discharge (lph) 1.00 0.50 emitter spacing (mt) 0.50 0.50 laterals per bed 1 2 Application rate (mm/hr) 1.31 1.31 Block run length – 366mt Original Tape diameter – 22mm Trial Tape Diameter – 16mm
Non PC Emitter considerations Most important is the dripper ‘ s clogging resistance Shorter water passage The larger the water The larger the surface length = Stronger passage area, the of the dripper's filter, turbulence = Lower lower is the dripper's the more resistant to dripper sensitivity to sensitivity to clogging clogging clogging 11
Non PC Emitter Range • Aries • Minimum 15mil WT • Largest filter • More open flow path • Best able to handle poor water • 4 years plus • Typhoon Plus • Max 15mil WT • Largest emitter filter in class • 2 to 5 years • Flow rates from 0.50lph • Streamline X • Max. 10 mil WT • Short term Crops • 1 to 2 years 12
Results • Post-plant water was 24 hours (0.3ML/Ha) less than the rest of the farm • Yield resulted in 100t/ha • Moving Forward: • Continually regrow trial area to evaluate yield/growth • Comparing lifting and replacing tape 2019/20 • Larger scale twin lateral trial 2020/21 upon renewal • Single use tape • Surface Irrigation
THANK YOU Th Thank You
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